Butyl iodide → 2-butyl-6-methoxy-3,4-dihydro-1(2H)-naphthalenone

Beteiligte Stoffe

Reaktionsschritte

A mixture of 6-methoxy-3,4-dihydro-1(2H)-naphthalenone (400 mg, 2.27 mmol), iodobutane (0.284 mL, 2.5 mmol), NaH (98 mg of a 61.1% dispersion in mineral oil, 2.5 mmol), and anhydrous tetrahydrofuran (THF, 1 mL) was placed under a N2 atmosphere and stirred at room temperature for 15.5 hours. The mixture was partitioned between EtOAc (20 mL) and water (30 mL) containing 2N HCl (3 mL). The organic phase was washed with brine (20 mL), dried over MgSO4, filtered, and evaporated under vacuum to afford an oil. The crude product was purified by preparative layer chromatography on five 0.1×20×20 cm silica gel GF plates (Analtech, Newark, Del.), developing with CH2Cl2. The UV visible product band was eluted with EtOAc and the eluant evaporated under vacuum to provide 2-butyl-6-methoxy-3,4-dihydro-1(2H)-naphthalenone as a clear oil.

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